@myColor: yellow;
.cat {
    color: green;
    width: (1010 / 2px);
    height: 100 - 29px;
    width: 100 * 20px;
    width: 68 ./ 37.5rem;
    width: 68 / 37.5rem;
    .eye {
        color: @myColor;
    }
    .paw {
        color: pink;
        &.claw {
            color: white;
        }
    }
}